Triple-gap spark-plug



If. D.. EARN EZYQ. TRIPEE GAP SHARK PLUG, .APPuc'ATmN man NOV. 3. 1919.

1342,4031; PatentedJune 8,19 20;

ATTORNEY strol sum SEAL $3175 3 Appliesfios.

n cooncy Se Lake uh, have invented certain e. .mipwvenaents in T rlple- Ga opaz'lz-Plugg of which the following 1s l 2L spec ficetion.

My invention relaes to the lgmtlon mechanism for internal combustion. engines,

has for its special purpose to preside triple-gap spark plug whereby she electric spark is lengthened sum-l also much mcresseo.

tempeml-fise.

These objects 1 inplish the vice illustrated in the cccompenymg (Mewinlzs in which similar letters and numerals of refwence ioclicete like parts throughout the figures asrl as described in the specificssion forming a of skis applicatioe end oointeol ouic in' the appended claims,

h l i l have shown a s2 system, emooilimem inversion Figure 1 is an elevation of the spark plug.

Fig. 2 is a longitudinal section of the some.

in a great many spark plugs the mealsclon, commonly made of porceleim is weakenecl by making it we slender or by removing the oentssl QOWZLC'LOH to such an extent e15: ii" is easily boo Also the commoely used spark plugs provide out one gap Wilhin the combustion chamber for the electrodes and the present invention provides for three for the electrode and also a- "slecion and consisfis of col-e seleses molly cylindrical in shape, and how two opposed inclined besrisg fax? s o: meal 5 s end portion 2 which 1s iniemlee. to exteno. Within the combusclon clmroloec of the insez'nel combustion engine is semicylindrice: in shape and has roove in ll-s end portion at 3 wit-ll in whico groove the grounol electrode is corned. I the boay of s'eiel end portion 2 1s secured two spececl sugars metal posts 5,

fiche elects-ode 6 and the end. oil said ground; electrode Each 0 1 solo. posse 5 i-E also the adjacent eieetrocle Elms end of the ground eleclsvocle wlucll is externally threaded for lose the combostion chamber, and v other eml so resolve the clamping sleeve nut The sole casing member C an inclme shoulder Specification of Letters Eocene,

filed; liqoveznber 1919.

' posts 5 in slime-meet with.

lel elneecl June 2?; $19.26?

Serial No.

therein and between soul shoulder face 2') of the iosolaizor l. peck log mel'nber 10 l used.

8 also has a shoulder 11 formed therein on an lnclineopposc so that of shoulder 9 and between said shoulder 11 end said. face a packing member 12 is Used in ol'cler the/.0 when said sleeve out is screwegl inlo said casing 71' the insulator will not be injured and will be firmly held by the sleeve not encl casing. The upper encl of the electrode e is enlarged and threaded and a portion of sold emerged. port is Within said insulator 1 3-111 nuts d. l; are screwefl sefl electrode o to hold the usual mic wire which is not she 11. v

The electric current in p ssi'ng from the electrode 6 to the ground electrode 4' will jump sh ree gaps a as and a2; and the spark wzll be islex'lsified (lue to the resistance; As orocluced 1s lower case the o he eel, it vac prevent eccomuletion of carbon in the come bustion chamber.

Having thus described my invention I desire to secure by Letters Patent one elm for internal eol'nbustion casing to be screwed into she ,ustlon chamber; am insulating core carried ibherein eml having a sorcion one end exsencleil form seemicylin ell-ice} support an electrode; a ground. el screwed into said casing and sent Enclose the exfiension of saicl core; central eleclzsmle carried and secured in losulefilng core end. ter minmbisg near the diemetrlcal face of said lnsulot core; anal two spaced apart motel 'sserposed between the encl of sold groom v electrode end said central electrocle to form terse spark gaps Within said com bustlon chamber.

A spark plug comprising a casing; an insulating core having a semlcylinclrlcel on one l Wish finally soil cllmsetrlc Li 3 ice; a ground electrmle secusz'e-s. in bent to engage 1 11 she recess 1?.

core; and metal posts secured in the poi-moo 0. 2 s 1 core extension. in tesizlmony whereof I have sfilxecl my s seems.

with e recess formed, in its The selo'sleeve out 7 induce hector combustion and 

